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1. (WO2018123466) OPTICAL BODY, DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, AND ILLUMINATION DEVICE

Pub. No.:    WO/2018/123466    International Application No.:    PCT/JP2017/043625
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 06 00:59:59 CET 2017
IPC: G02B 3/00
F21V 5/04
G02B 5/02
G02F 1/13357
G03B 21/14
G09F 9/00
Applicants: DEXERIALS CORPORATION
デクセリアルズ株式会社
Inventors: ARIMA, Mitsuo
有馬 光雄
ISHIWATA, Masayuki
石渡 正之
NAGAHAMA, Tsutomu
長浜 勉
Title: OPTICAL BODY, DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, AND ILLUMINATION DEVICE
Abstract:
[Problem] To suppress the occurrence of periodic optical characteristics in a structural unit larger than an aperiodic structure in an optical body in which a microlens array serving as the aperiodic structure is arrayed and expanded in a wide area. [Solution] This optical body is a single or an aggregated plurality of aperiodic structure regions constituted by a single lens group comprising a plurality of single lenses. In the aperiodic structure region, the arrangement state of the single lens group is aperiodic as a whole, and the ratio of the size of the aperiodic structure region to the average aperture diameter of the single lens in the aperiodic structure region is 25 times or more.